EP 0571903 A1 19931201 - A method for preparing low free formaldehyde methylol-hydantoins and compositions thereof.
Title (en)
A method for preparing low free formaldehyde methylol-hydantoins and compositions thereof.
Title (de)
Methode um Methylol-Hydantoine mit niedriger Konzentration an freiem Formaldehyd, Herstellung und deren Zusammensetzungen.
Title (fr)
Méthode de préparation de méthylol-hydantoines à faible teneur en formaldéhyde libre, ainsi que leurs compositions.
Publication
Application
Priority
US 88728092 A 19920521
Abstract (en)
Compositions of dimethyloldimethylhydantoin, monomethyloldimethylhydantoin, and dimethylhydantoin having less than 0.1% by weight of free formaldehyde based upon 100% by weight of total composition; and wherein the weight ratio of dimethyloldimethylhydantoin to monomethyloldimethylhydantoin ranges from about 1:1.25 to about 3.5:1, are provided. These compositions may be prepared (1) by reacting dimethylhydantoin and a formaldehyde-containing source wherein the molar ratio of formaldehyde to dimethylhydantoin ranges from about 1.2:1 to about 1.55:1 or (2) by admixing (a) from about 80 to about 90% by weight of an aqueous solution of methyloldimethylhydantoin having greater than about 0.1% by weight of free formaldehyde with (b) about 20 to about 10% by weight of dimethylhydantoin based upon 100% weight of aqueous dimethyloldimethylhydantoin solution and dimethylhydantoin combined.
IPC 1-7
IPC 8 full level
A61K 8/49 (2006.01); A01N 43/50 (2006.01); A61K 8/35 (2006.01); A61K 31/415 (2006.01); A61K 31/4166 (2006.01); A61L 2/16 (2006.01); A61P 31/04 (2006.01); C07D 233/72 (2006.01); C07D 233/78 (2006.01)
CPC (source: EP KR US)
A01N 43/52 (2013.01 - KR); A61P 31/04 (2018.01 - EP); C07D 233/78 (2013.01 - EP KR US)
Citation (search report)
- [YD] US 3987184 A 19761019 - FOELSCH DONALD HENRY
- [Y] EP 0391645 A1 19901010 - LONZA AG [US]
- [Y] US 5037843 A 19910806 - SCHOENBERG THOMAS G [US]
- [YP] PATENT ABSTRACTS OF JAPAN vol. 017, no. 225 (C-1055)10 May 1993 & JP-A-04 360873 ( MITSUI TOATSU CHEM INC. ) 14 December 1992
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0571903 A1 19931201; EP 0571903 B1 19960828; AT E141919 T1 19960915; AU 3872693 A 19931202; AU 662409 B2 19950831; BR 9302029 A 19931130; CA 2093045 A1 19931122; CA 2093045 C 19970318; CN 1064813 C 20010425; CN 1087778 A 19940615; CN 1305859 C 20070321; CN 1308067 A 20010815; DE 69304253 D1 19961002; DE 69304253 T2 19970130; DK 0571903 T3 19970210; ES 2093878 T3 19970101; GR 3021711 T3 19970228; HU 9301478 D0 19930928; HU T64177 A 19931228; JP 2657148 B2 19970924; JP H06179658 A 19940628; KR 940005580 A 19940321; KR 970002875 B1 19970312; MX 9303006 A 19970830; PL 173173 B1 19980227; PL 173873 B1 19980529; PL 299028 A1 19940110; RU 2126272 C1 19990220; TW 378152 B 20000101; UA 37187 C2 20010515; US 5405862 A 19950411; ZA 933464 B 19931220
DOCDB simple family (application)
EP 93108285 A 19930521; AT 93108285 T 19930521; AU 3872693 A 19930521; BR 9302029 A 19930524; CA 2093045 A 19930520; CN 00124254 A 20000821; CN 93108228 A 19930521; DE 69304253 T 19930521; DK 93108285 T 19930521; ES 93108285 T 19930521; GR 960403104 T 19961120; HU 9301478 A 19930520; JP 15599993 A 19930521; KR 930008897 A 19930520; MX 9303006 A 19930521; PL 29902893 A 19930521; PL 31842893 A 19930521; RU 93036963 A 19930520; TW 82105854 A 19930722; UA 93004631 A 19930528; US 19689494 A 19940214; ZA 933464 A 19930518